US4183229A - Flexible coupling - Google Patents

Flexible coupling Download PDF

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Publication number
US4183229A
US4183229A US05/814,399 US81439977A US4183229A US 4183229 A US4183229 A US 4183229A US 81439977 A US81439977 A US 81439977A US 4183229 A US4183229 A US 4183229A
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United States
Prior art keywords
cavities
flexible coupling
axes
defines
generally circular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US05/814,399
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English (en)
Inventor
Carl E. Johansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF Industrial Trading and Development Co BV
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SKF Industrial Trading and Development Co BV
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Application filed by SKF Industrial Trading and Development Co BV filed Critical SKF Industrial Trading and Development Co BV
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Publication of US4183229A publication Critical patent/US4183229A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load
    • F16D3/58—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load the intermediate members being made of rubber or like material

Definitions

  • This invention relates to flexible couplings comprising coupling halves linked together via intermediate resilient elements, generally as disclosed in U.S. Pat. No. 3,977,212.
  • the coupled machined parts require extremely accurate mutual alignment.
  • the resilient material may become indented, which leads to imbalance of the device.
  • the new coupling offers advantages in respect of assembly and disassembly.
  • the coupled machine parts or the like no longer require extremely accurate mutual alignment, because incomplete alignment of the drive and driven shafts to be coupled has little if any effect on power transmission.
  • the invention provides means by which the direct transmission to the resilient elements, for example, of a load pressing on the coupling, such as a fly-wheel linked via the coupled shafts, is effectively prevented.
  • At least one of the mutually opposed surfaces of the two coupling halves is designed with a longitudinal curvature, such that the two coupling halves are in mutual contact along at least one interrupted line of contact.
  • This measure also prevents indentation or pressing of the resilient elements when two interconnected shafts are misaligned. Since it is no longer possible for the resilient elements to be indented, the occurrence of an extra imbalance inherent in the design is also prevented.
  • This kind of imbalance can be the result of possible differences in elasticity between the various resilient elements and, for example, in the off position, from asymmetric location of these elements in relation to the mid-plane of the coupling perpendicular to the longitudinal direction.
  • an advantageous contact between the two coupling halves is obtained when a curved surface is given a convex curvature.
  • the best adaptability to misalignment of two shafts is obtained, according to the invention, by shaping a curved surface symmetrically with respect to its mid-plane perpendicular to the longitudinal direction.
  • FIG. 2 is an extended, transverse sectional view taken along the line II--II in FIG. 1.
  • Coupling half 3 consisting of parts 4 and 5 is provided with holes 9 for receiving set screws (not shown) whereby this coupling half can be connected to a machine element 10. With the aid of a key-way 11 in element 10 coupling half 3 connected to element 10 can be coupled to a shaft (not shown) having axis 12.
  • the inner coupling half 2 has an outer surface 13 of convex curvature which forms a segment of a sphere with center 14.
  • the diameter of the sphere is almost the same as the internal diameter of the outer coupling half 3, such that the coupling halves 2 and 3 make mutual contact along an interrupted line (see FIG. 2).
  • the diameter of the sphere is preferably selected such that on rotation of the coupling, the area of the power-transmitting bowl-shaped surface A between the element 6 and the coupling half 3 multiplied by the mean radius R a of that surface is the same as the product of the area of the power-transmitting bowl-shaped surface B between element 6 and coupling half 2 and the mean radius R b of the latter surface.
  • Each pair of bowlshaped surfaces A and B are cavities which together define a pocket for containing one resilient element 6.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Pens And Brushes (AREA)
  • Toys (AREA)
US05/814,399 1976-07-09 1977-07-11 Flexible coupling Expired - Lifetime US4183229A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7607603A NL7607603A (nl) 1976-07-09 1976-07-09 Flexibele koppeling.
NL7607603 1976-07-09

Publications (1)

Publication Number Publication Date
US4183229A true US4183229A (en) 1980-01-15

Family

ID=19826569

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/814,399 Expired - Lifetime US4183229A (en) 1976-07-09 1977-07-11 Flexible coupling

Country Status (9)

Country Link
US (1) US4183229A (sv)
JP (1) JPS538450A (sv)
CA (1) CA1080991A (sv)
DE (1) DE2730311A1 (sv)
FR (1) FR2357779A1 (sv)
GB (1) GB1581604A (sv)
IT (1) IT1115366B (sv)
NL (1) NL7607603A (sv)
SE (1) SE7707765L (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4472159A (en) * 1980-12-20 1984-09-18 Uni-Cardan Aktiengesellschaft Angularly movable universal joint
FR2606248A1 (fr) * 1986-11-10 1988-05-13 Kubota Ltd Transmission pour tondeuse a gazon
US4768993A (en) * 1986-02-04 1988-09-06 Ab Skf Ball coupling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8702662A (pt) * 1987-05-25 1988-12-13 Jorge Durval Menezes De Paiva Sistema de transmissao homocinetica para eixos desalinhados em ate 45 graus em qualquer direcao,garantindo o mesmo movimento em ambos os eixos

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1324315A (en) * 1919-12-09 Ttniversax
US2182455A (en) * 1937-10-28 1939-12-05 William F Smith Flexible coupling
US2313279A (en) * 1938-08-01 1943-03-09 Suczek Robert Universal joint
US2615317A (en) * 1949-05-31 1952-10-28 Alfred H Rzeppa Constant velocity universal joint
US3107505A (en) * 1961-02-15 1963-10-22 Hague Mfg Company Universal joint
US3934429A (en) * 1973-06-30 1976-01-27 Nissan Motor Company Limited Constant velocity universal joint
US3935717A (en) * 1973-03-26 1976-02-03 Lohr & Bromkamp Gmbh Universal joint
US3946576A (en) * 1972-04-07 1976-03-30 Skf Industrial Trading And Development Company B.V. Flexible coupling
US3977212A (en) * 1973-05-14 1976-08-31 Skf Industrial Trading And Development Company, B.V. Flexible coupling
US4020648A (en) * 1974-12-23 1977-05-03 Lohr & Bromkamp Gmbh Constant velocity torque transmitting joint
US4020650A (en) * 1976-01-12 1977-05-03 Lohr & Bromkamp Gmbh Constant velocity universal joint and ball grooves therefor

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1324315A (en) * 1919-12-09 Ttniversax
US2182455A (en) * 1937-10-28 1939-12-05 William F Smith Flexible coupling
US2313279A (en) * 1938-08-01 1943-03-09 Suczek Robert Universal joint
US2615317A (en) * 1949-05-31 1952-10-28 Alfred H Rzeppa Constant velocity universal joint
US3107505A (en) * 1961-02-15 1963-10-22 Hague Mfg Company Universal joint
US3946576A (en) * 1972-04-07 1976-03-30 Skf Industrial Trading And Development Company B.V. Flexible coupling
GB1430152A (en) * 1972-04-07 1976-03-31 Skf Ind Trading & Dev Flexible coupling
US3935717A (en) * 1973-03-26 1976-02-03 Lohr & Bromkamp Gmbh Universal joint
US3977212A (en) * 1973-05-14 1976-08-31 Skf Industrial Trading And Development Company, B.V. Flexible coupling
US3934429A (en) * 1973-06-30 1976-01-27 Nissan Motor Company Limited Constant velocity universal joint
US4020648A (en) * 1974-12-23 1977-05-03 Lohr & Bromkamp Gmbh Constant velocity torque transmitting joint
US4020650A (en) * 1976-01-12 1977-05-03 Lohr & Bromkamp Gmbh Constant velocity universal joint and ball grooves therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4472159A (en) * 1980-12-20 1984-09-18 Uni-Cardan Aktiengesellschaft Angularly movable universal joint
US4768993A (en) * 1986-02-04 1988-09-06 Ab Skf Ball coupling
FR2606248A1 (fr) * 1986-11-10 1988-05-13 Kubota Ltd Transmission pour tondeuse a gazon
US4811552A (en) * 1986-11-10 1989-03-14 Kubota Ltd. Propelling drive transmission structure for walking operator type lawn mower

Also Published As

Publication number Publication date
GB1581604A (en) 1980-12-17
DE2730311A1 (de) 1978-01-12
FR2357779A1 (fr) 1978-02-03
SE7707765L (sv) 1978-01-10
IT1115366B (it) 1986-02-03
JPS538450A (en) 1978-01-25
NL7607603A (nl) 1978-01-11
CA1080991A (en) 1980-07-08

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